Friction shock absorbing mechanism



Aug. 10, 1943. G. E. DATH FRICTION SHOCK ABSORBING MECHANISM Filed Aug. 25, 1941 -2-Sheets-Sheet l Aug. 10, 1943. "G. E. DATH 2,326,288

. 'mzcuou saocx ABSORBI'NG MECHANISM Filed Aug. 25, 1941 2 Sheets-Sheet 2 lave/afar eorgeEf Bat/L Patented Aug. 10, 1943 v mmrs lo sin me aware U I This inventionrela'tes tov improvements fric} tion shock absorbing mechanisms, and more par 7 ticularly to mechanisms of this character comprising a casing having a frictionfshell section at one end thereo'fla fricti0n c1utch comprising 1 a wedge'and shoes slidable Within the shelL'a spring resistance,opposinginward movement"oi the shoes, and a movable spring cap. at the other -l 1 .a 'fretaining ring-1B having screw thre'adedcone110 screwin bygbei mechanism asset forth inT-the precedingjpara- I graph, detachablejretaining means fortlie spring cap; comprising a lockingjjring havingqa s crewj "threaded connection with the casing and, shouldered engagement with the springvcap with simple and efficient means for locking the screw ring against rotation to prevent accidental V 'detachm'entof the same.

A more specific object" of the inventionto provide means of. the character indicated'in the V preceding paragraph, for locking the screw ring against rotation, comprising cooperating,mean's onthecasingand spring cap fOiihOldliiflQf the cap against rotationwith respect toithe'oasing, and

'interengaging means on the: spring. cap and 'screw ring for holding the. latter 'a'g ainst rotation, wherein the locked condition between the} spring cap and the screw ring] is 'rnaintainedu'bythe expansive action of the mainfspring resistance oi the shockabsorbing rnechanismi we i .Otherbbjects of the invention will more clearly I appear from the description and fclairn's hereinafterffollowing. a .7

In thedrawings forming'la partf-of this" specification Figure'l is a part. plansand .part horizontal longitudinal sectional .view. of ffa irict ion shock absorbing mechanism illustrating iin provements inconnection therewith .l'1=igure f2 is ;fit'within;the1sa rne w a rearelevational view of the mechanismllooking' in the :directionfof th e.'arro wse 2 i Figure 1. Figures 3 and 4 aretransversej er- #0111 14, oi the; cap JA iis' provided with iour-out; se di insane; fe +1 em ual about the circumference of the cap improvemen gcomprise Icap Alat theirear end ofl the casing :l flzandir iteri-" if locked therewith Zagaihs t reIatiVe rqt'ationgand mcfioriv Wi h se en jh ldz-a a t" w 1 'nterloclged with the: spring cap.

w s, am s of upashaned fqrrn, coin a transverse rner tQf-Jthe cas ng, Z The; cylindrical .po'

:egrtend lengthwise of thezcap vand ter-Im atefs eft e t rlen her o s ndis t datl'a,. 1 a j The retaining ring ;B haszan external threaded connection- 20 withthe :wall eta: circular open! ing 2! provided irr'the}transverse-rear}wallin 1 of the; casing JP);l-Ifhepopeningoithe ring Blis V tion lengthwise ofthe gear; :21,- 5ThermsB-is fu th rw e w th four n- .ticalsectional viewsgcorresponding I respectively 1 tothe lines 3-4 and. 4i45df;FigureZ1. Figure 5 is a view similar to Figure lfillustrating the manner offassemblingthe parts of ithe lmechal nism. Figurefi is a view similar to Figure 2 il- 1l1i'strating another embodimentof the invention. 7 v I The friction shlockv absorbing mechanism corn;- prises afriction casing ll) of substantiallyvli ectangular transverse cross section atthe rear end portion thereof, a irictionclutchfll ,sli'dable, .7

' w'ithinthe casing, and springs {12,13 andll'3 0 .i v s z as o; acf o o te th tu u rjli' portion-l 40f the cap for movement ma; dire w. pted to etmmoda'te the; ribs l a-'-' l a a :;--.'I he-rnain sprin comprising the coils 2 I H 3 of the, shock absorbing ehamsni:; bears dire l ionl e me cap- ,.;lnor lrho1ds the same in} th m lested position shown in 'g -l rotation;withprespeot'to :theycasing' l6,itheyrilos 7 18 of the ca'p'heing engaged:inwythegnotches,:23

0t: heri sith ie v k ng'these; wo-m mb r 4 opposing movement of the clutch. This lrne ha-vnisni thus far described is wellfkn o wn irithe art,

l and is similar to -the corresponding'parts of the mechanism illu'strat'ed --in Patent 2,050,541 grantedto R. J. .OIander, August "11, 1936, and the operation thereof is similar to nism disclosed in this patent.

the mecha-,

' same through the op ns flange 1; l6; oLtheQIcapgA in m locking the cap i to er as 1 em t.andlh -s om n .1 of,

against. rotation bys' 'b'einfg". shouldered against thelsid e wa1l's of thecasing I f I In" assembling. "the frhechanis w clutch I! and the springs IL-lR-lltf air placed within the. casing l 9 by 7 insert H at the warm jo'f the casing. :'The enlargedfportion of theflangedfn end ofthe spring cap A is then inserteclthrough said opening 2l'with the. cap in tiltedlposition fB inscrewing the ring :13.

and offset with respect to said opening to permit said enlarged portion I? to pass freely fthroughthe opening. The cap is then moved if a y a d-'right dr seat the portion .11 of the flange thereof; in the cornen of the casing and pass the remainder of theflange [6 through 'binationfwith acasing having an open end pro 1 cap slidable within the casing; an inwardly and outwardlyfadjustable retaining ringhaving ex- .fternal threads in threaded engagement with said the opening 2|; Asshowninliligure' 5,.the' cap. is then forced inwardly against'theresistanoeiof thesprings l2, l3 and ll 3,' by; arsuiiaple :tool; such as a bar or plunger 26 twhilegthewcasing is.

I v buttressed against a'block in the form of a ring 21 "compressing the springsland brought to a.,

position wherein'the outer ends of the ribs [8 thatthe ring. 21 is of greater thickness' than the projection of the wedgedf the clutch l l' thereby preventing the clutch from being forced inwardlyduring'the assembling operation, 'so

that the springs ii 2, l 3 and 1 life are, compressed 'on'lygdue tofginward displacement of the spring V I Th e ring'B is thenpa'ss'ed, overthe outer end ofthe'cap and screwed into the opening 2! tosecure theisame'tdthegcasing l0. In secur} 'ing the ringto the casing, the same isturned position" wherein thei notlches gli register "with theribs L8 of thecap A; Inward'pressure i'sfthen removed from the'cap; A permitting the springs; 12513 H} -11; expand" and 'i'orce the v ofthe cap are disposed at a point inwardly of" "the position, occupied by the .ring B .wheni: the

latter is in its normal assembled position with the casing. In this'connectionfit is pointed out i; 2.;In a shock ab'sorbing mechanism; the com binationwith a rectangular casing having a cir cap havingfanexternaljlangefatits inner end in: shouldered engagementfwithithe ring, said flange v having aneiitensionseated in one of the corners 30.

.s'ame outwardly," thereby bringing the ribs" [8 v in't'ointerlocked relation with the notches 231 When the mechanism hasthus been completee assembled;outwardmcvernent of the cap ,Afis

limited by{engagement of the'iiange 16'- thereof with the retaining" ring B; and. th ring B is m againstrotation being" interlocked with the 1 cap}; whichin turnis'held-against rotation wits-respect tothe'casingrlo bythe'shoulde'red en agement provided betweenthe sidewalls "of.

v and interlocked withvthering. j

theqcasirigjandthe enlargedportionll flange of the'cap.

when-forany reason it'is found desirable to'take thegear apart, 'by forcing the cap' Ainwardly until" the ribs la ar'e' disengaged frern theirin'g Beferrin gnext' to the 'embodimen t 'ot the ventionshown in Figure 6j the'construction is the same as that-illustrated inF'igures 1' tot,

'inclusive with the exception that interlocking i 'Ihe sp'ringicap V-A- may :beareadily removed V? ribs-and notches of-the spring cap'a'rl'd ri'n'gare "reversed. A's shown in' Figure 6', the ring" B is I provide'dwithjtwelve ribs I llafidth reaps with a corresponding number of "cooperating notches 1 123]; Although twelve cooperatingfribs "and dn'ot ch'es arefillustrated in'rthedrawings'it {will beevident that {greater orlesser number may l' .=:emDloyed; As" will 'be evident by increasing the number of cooperating ribs and notches a 1 diner adjustment ofthe screwthreaded locking ringBis obtained.-- r

I'have herein shownanddescribed hat'lnowconsider the preferredfmanner of carrying out my invention, butt he sameis merely illustrative "and I' contemplate all changes and modifications ipended heretos-i .11 1 claim*:

-that comevwithin the scope of:v the 'claimsjap- 1. 'In' a shock absorbing mechanism, the com;

vided with internal threads, said casing having meeting side walls forming a corner; of. aspring internal threads of the casing for securing said ring'to'the casing and permitting inward and putward adjustment of said ring, said spring cap having shoifldered engagement with said ring to limit outwar'd movement of the cap, said cap I having a lateral projection shouldered in the cor-.

ner of theicasingto hold said cap against rotation; interengaging locking means on the cap 7 andgring for locking the same together against a relative; rotationlbutpe'rmittingjrelative longitur dinalmovement' thereof; and springmeans with in -the"casingjyieldingly holding said cap [projectedwith thello'cking means thereof interlocked withithelockingmeans of the ring,

cularjope ning atjo'ne end,l,,s'aid opening being -threaded; ofa'spring capsIidableWithinthe casin a retaining ring in threaded engagement with-the threads ,of ,said ;ope ning; said spring of the casing to hold said cap against rotation;

interengaging meanson jfsaidcap and ringito lock the 'same against relative rotation; and springs in the"casin'g holdingsaidcap projected 3.1 Inia shock absorbing mechanisnljthetcombination with a casing having. an opening atone end,,said casingbeing o'fi angular cross section .o fi ajretaining ring screwed intof said opening; a

i ap. slidfable lengthwise ofl the: mechanism .andextending',through said rilngysaidaoap 1m;- f la fiange. at the tinner e'nd in shouldered en; I gagement: with the 1 ring to restrict outward.

movement of thejj cap; interengaging ribs and l'notchesj on 'said cap and ring "tojhold said ring and cap against relative rotationf said ribs being slidable lengthwise ;in saidnotches; can 7 angular wing on said capfittingin a corner of saidca'sing threaded: ring" 'screwed into said opening; a :spring' cap having a cylindrical portion project:

ingfthrough said ring, said cap having a flange atithe inner end thereof adapted to seat'on said ring; to limit outward movement of said cap;

said flange having a projecting angular portion fitting withinoneflofthe interior corners of the v a n ti lo k dl a ns ro ation a i 'havinglongitudinally' extending exterior ribs terurinating short of the outer 'end of the 'c'ap; notches in saidring within which said ribsare engaged to lock the capjand ring together against relative rotation; and spring means within the casing normally holding said cap Projected; I,

' QV'GEORGIE it. DATE. 

